EP2222109B1 - Mobile station - Google Patents
Mobile station Download PDFInfo
- Publication number
- EP2222109B1 EP2222109B1 EP09754799.6A EP09754799A EP2222109B1 EP 2222109 B1 EP2222109 B1 EP 2222109B1 EP 09754799 A EP09754799 A EP 09754799A EP 2222109 B1 EP2222109 B1 EP 2222109B1
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- European Patent Office
- Prior art keywords
- measurement report
- timings
- repeatedly transmit
- mobile station
- reporting interval
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
Definitions
- the present invention relates to a mobile station configured to start transmitting a measurement report including a radio quality of a cell upon detecting that a monitor period has passed in a state where the radio quality of the cell still satisfies entering conditions, and to repeatedly transmit the measurement report at reporting intervals until leaving conditions are satisfied.
- an "Event Triggered Periodical Reporting” system is known as a method of transmitting a "Measurement Report" by a mobile station UE.
- a mobile station UE is configured to start transmitting a "Measurement Report (measurement report)" including an "RSRP: Reference Signal Received Power (radio quality)" of a cell designated by a radio base station eNB, upon detecting that "Time to Trigger (monitor period) " has passed in a state where the "RSRP (radio quality)” of the cell still satisfies entering conditions, and to repeatedly transmit the "Measurement Report (measurement report)" at "Reporting Intervals (reporting interval)” until leaving conditions are satisfied.
- RSRP Reference Signal Received Power
- a mobile station UE when a mobile station UE detects, at t1, that an "RSRP (radio quality)" of a cell A satisfies entering conditions, and detects, at t3, that “Time to Trigger (monitor period) " has expired in a state where the "RSRP (radio quality)" of the cell A still satisfies the entering conditions, the mobile station UE starts transmitting a "Measurement Report (measurement report)" including the "RSRP (radio quality)" of the cell A.
- Measurement Report Measurement report
- the mobile station UE repeatedly transmits the "Measurement Report (measurement report)" at the “Reporting Intervals (reporting interval)", for example, at t5 and t7.
- the mobile station UE when the mobile station UE detects, at t2, that an "RSRP (radio quality)" of a cell B satisfies the entering conditions, and detects, at t4, that "Time to Trigger (monitor period)" has expired in a state where the "RSRP (radio quality) " of the cell B still satisfies the entering conditions, the mobile station UE starts transmitting a "Measurement Report (measurement report)" including the "RSRP (radio quality)" of the cell B.
- Measurement Report Measurement report
- the mobile station UE repeatedly transmits the "Measurement Report (measurement report)" at "Reporting Intervals (reporting interval)", for example, at t6 and t8.
- a mobile station UE transmits "Measurement Reports (measurement report)" more frequently as the number of cells to be measured by the mobile station UE increases. This causes a problem that radio resources may be wasted.
- an object of the present invention is to provide a mobile station which is capable of implementing a method, such as an "Event Triggered Periodical Reporting" system, of repeatedly transmitting a "Measurement Report (measurement report)" by efficiently using radio resources.
- a first aspect of the present invention is summarized as a mobile station configured to start transmitting a measurement report including a radio quality of a cell upon detecting that a monitor period has passed in a state where the radio quality of the cell still satisfies an entering condition, and to repeatedly transmit the measurement report at reporting intervals until a leaving condition is satisfied, wherein, when the mobile station starts transmitting a first measurement report including a radio quality of a first cell and thereafter starts transmitting a second measurement report including a radio quality of a second cell, the mobile station is configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report, at the same timings.
- the mobile station when the mobile station does not detect that the monitor period has passed in a state where the radio quality of the second cell still satisfies the entering condition, and when one of the timings to repeatedly transmit the first measurement report comes, the mobile station can be configured not to start transmitting the second measurement report.
- one of the timings to repeatedly transmit the first measurement report can be adjusted to concur with a timing to start transmitting the second measurement report.
- a timing to start transmitting the first measurement report can be adjusted to concur with a timing to start transmitting the second measurement report.
- a maximum reporting interval and a minimum reporting interval can be managed as the reporting intervals, and the mobile station can be configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report at the same timings, when a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval overlaps at least partially with a period between one of the timings to repeatedly transmit the second measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the second measurement report determined by the minimum reporting interval.
- a maximum reporting interval and a minimum reporting interval can be managed as the reporting intervals, and the mobile station can be configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report not at the same timings, when a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval does not overlap even partially with a period between one of the timings to repeatedly transmit the second measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the second measurement report determined by the minimum reporting interval.
- a maximum reporting interval and a minimum reporting interval can be managed as the reporting intervals, and the mobile station can be configured to adjust to concurs a starting point of the reporting interval used to determine the timings to repeatedly transmit the first measurement report a timing to start transmitting the second measurement report, when the mobile station starts transmitting the second measurement report within a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval.
- the present invention is able to provide a mobile station which is capable of implementing a method, such as an "Event Triggered Periodical Reporting" system, of repeatedly transmitting a "Measurement Report (measurement report)" by effectively using radio resources.
- a mobile station UE In order to transmit a "Measurement Report (measurement report)", a mobile station UE needs to receive an allocation of an uplink transmission resource from a radio base station eNB. Thus, the mobile station UE needs to transmit a "Scheduling Request (allocation request)" to a radio base station eNB.
- the radio base station eNB needs to transmit "PDCCH" which is signaling to specify the resource.
- FIG. 1 to FIG. 9 a description will be given of a configuration of a mobile communication system according to a first embodiment of the present invention.
- a mobile communication system which employs the LTE system will be described in the present embodiment.
- the present invention is not limited to this and is also applicable to mobile communication systems which employ other systems.
- Event Triggered Periodical Reporting system is employed in the present embodiment, as a method of transmitting "Measurement Reports" by a mobile station UE.
- a radio base station eNB is configured to transmit a "Measurement Configuration" to the mobile station UE, by use of an "RRC Connection Reconfiguration".
- the radio base station eNB is configured to transmit a "Measurement ID", a "Measurement Object", or a "Reporting Configuration", by use of a "Measurement Configuration”.
- the "Measurement Object” is information to designate a measurement target cell (for example, RAT information, frequency information, circumference cell information, or the like).
- the "Reporting Configuration” is information to designate a method of transmitting a "Measurement Report (measurement report)".
- the "Reporting Configuration” includes an "Event (entering conditions)", “Time to Trigger (monitor period)", a “Reporting Interval (reporting interval)", various parameters, and the like.
- the "Measurement ID" is information to associate the "Measurement Object" with the "Reporting Configuration”.
- the mobile station UE is configured to measure a radio quality (for example, RSRP) of a certain cell on the basis of the "Measurement Configuration" transmitted by the radio base station eNB, and to transmit a "Measurement Report (measurement report)" including the measurement result.
- a radio quality for example, RSRP
- the mobile station UE includes a Measurement Configuration receiver unit 11, a measuring unit 12, and a Measurement Report transmitter unit 13.
- the Measurement Configuration receiver unit 11 is configured to receive the "Measurement Configuration" transmitted by the radio base station eNB.
- the Measurement Configuration receiver unit 11 is configured to manage a "Measurement ID", a "Measurement Object", and a "Reporting Configuration”, on the basis of the "Measurement Configuration" thus received.
- the measuring unit 12 is configured to extract a "Measurement Object" associated with the "Measurement ID" managed by the Measurement Configuration receiver unit 11.
- the measuring unit 12 is configured to measure a radio quality of a cell designated by the extracted "Measurement Object".
- the Measurement Report transmitter unit 13 is configured to transmit a "Measurement Report (measurement report)" according to the "Event Triggered Periodical Reporting" system.
- the Measurement Report transmitter unit 13 is configured to start transmitting a "Measurement Report (measurement report)" including a radio quality (for example, RSRP) of a measurement target cell which is measured by the measuring unit 12, when the Measurement Report transmitter unit 13 detects that "Time to Trigger (monitor period) " has passed in a state where the radio quality of the cell still satisfies "Event (entering conditions)", and to repeatedly transmit the "Measurement Report (measurement report)" at "Reporting Intervals (reporting interval)” until leaving conditions (for example, a predetermined number of transmission, or the like) are satisfied.
- RSRP radio quality
- the Measurement Report transmitter unit 13 is configured to extract a "Reporting Configuration" associated with the "Measurement ID" managed by the Measurement Configuration receiver unit 11.
- the Measurement Report transmitter unit 13 is configured to transmit a "Measurement Report (measurement report)", on the basis of a method specified by the extracted "Reporting Configuration”.
- the Measurement Report transmitter unit 13 starts transmitting a "Measurement Report (first measurement report) " including a radio quality of a first cell, and then starts transmitting a "Measurement Report (second measurement report)” including a radio quality of a second cell.
- the Measurement Report transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)", and to repeatedly transmit the "Measurement Report (second measurement report)" at the same timings.
- the Measurement Report transmitter unit 13 starts transmitting, at t3, a "Measurement Report (first measurement report)" including a radio quality of a cell A (first cell), and then starts transmitting, at t4, a "Measurement Report (second measurement report)” including a radio quality of a cell B (second cell).
- the Measurement Report transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)", and to repeatedly transmit "the Measurement Report (second measurement report)" at the same timings, i.e., at t5 and t7.
- the Measurement Report transmitter unit 13 may be configured not to start transmitting the "Measurement Report (second measurement report) ", even when one of timings to repeatedly transmit the "Measurement Report (first measurement report)" has come.
- the Measurement Report transmitter unit 13 does not detect, at t6, that "Time to Trigger (monitor period) " has passed in a state where a radio quality of a cell C (second cell) still satisfies an "Event (entering conditions)".
- the Measurement Report transmitter unit 13 is configured not to start transmitting a "Measurement Report (second measurement report) " including the radio quality of the cell C (second cell), even when one of timings to repeatedly transmit a "Measurement Report (first measurement report)" including a radio quality of a cell A (first cell) has come.
- the Measurement Report transmitter unit 13 may be configured to adjust to concur a starting point of the "Reporting Interval (reporting interval) " used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)" with a timing to start transmitting the "Measurement Report (second measurement report)”.
- the Measurement Report transmitter unit 13 may be configured to change the starting point of the "Reporting Interval (reporting interval)" used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)” including the radio quality of the cell A (first cell), from t5, to a timing to start transmitting the "Measurement Report (second measurement report) " including the radio quality of the cell B (second cell), i.e., to t4.
- Reporting Interval reporting interval
- the Measurement Report transmitter unit 13 may be configured to manage a "Max RI (Maximum Reporting Interval)" and a “Min RI (Minimum Reporting Interval)" as the “Reporting Intervals (reporting interval)".
- the Measurement Report transmitter unit 13 may be configured to repeatedly transmit the "Measurement Report (first measurement report)" and to repeatedly transmit the "Measurement Report (second measurement report)” at the same timings in the following case.
- the case is where a period between one of the timings to repeatedly transmit the "Measurement Report (first measurement report)” determined by the “Max RI (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (first measurement report)” determined by the “Min RI (Minimum Reporting Interval)” overlaps at least partially with a period between one of the timings to repeatedly transmit the "Measurement Report (second measurement report) " determined by the "Max RI (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (second measurement report)” determined by the "Min RI (Minimum Reporting Interval)".
- one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by the “Max RI (Maximum Reporting Interval)” is "t7"
- one of the timings to repeatedly transmit the "Measurement Report (first measurement report)” including the radio quality of the cell A determined by the "Min RI (Minimum Reporting Interval)” is "15”.
- the Measurement Report transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)” including the radio quality of the cell A, and to repeatedly transmit the “Measurement Report (second measurement report) " including the radio quality of the cell B at the same timing, i.e., at t7.
- the Measurement Report transmitter unit 13 may be configured to, not at the same timings, repeatedly transmit the "Measurement Report (first measurement report)" and to repeatedly transmit the “Measurement Report (second measurement report)” in the following case.
- the case is where a period between one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" determined by the "Max RJ.
- one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by “Max RI (Maximum Reporting Interval)” is "t6"
- one of the timings to repeatedly transmit the "Measurement Report (first measurement report)” including the radio quality of the cell A determined by "Min RI (Minimum Reporting Interval)” is "t5".
- one of the timings to repeatedly transmit the "Measurement Report (second measurement report) " including the radio quality of the cell B determined by the “Max RI (Maximum Reporting Interval)” is "t8"
- one of the timings to repeatedly transmit the "Measurement Report (second measurement report)” including the radio quality of the cell B determined by the "Min RI (Minimum Reporting Interval)” is "t7”.
- the Measurement Report transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report) " including the radio quality of the cell A at t6, and to repeatedly transmit the "Measurement Report (second measurement report)” including the radio quality of the cell B at t8.
- the Measurement Report transmitter unit 13 may be configured to adjust to concur the starting point of "Reporting Interval (reporting interval) " used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)” with a timing to start transmitting the "Measurement Report (second measurement report)” in the following case.
- the Measurement Report transmitter unit 13 starts transmitting the "Measurement Report (second measurement report)" during a period between one of the timings to repeatedly transmit the “Measurement Report (first measurement report)” determined by the “Max RI (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (first measurement report)” determined by the “Min RI (Minimum Reporting Interval)".
- one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by “Max RI (Maximum Reporting Interval)” is "t8"
- one of the timings to repeatedly transmit the "Measurement Report (first measurement report)” including the radio quality of the cell A determined by "Min RI (Minimum Reporting Interval)” is "t6”.
- the timing when the Measurement Report transmitter unit 13 starts transmitting the "Measurement Report (second measurement report) " including the radio quality of the cell C is "t7".
- the Measurement Report transmitter unit 13 may be configured to change the starting point of the "Reporting Interval (reporting interval) "used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)” including the radio quality of the cell A, from t8, to a timing to start transmitting the "Measurement Report (second measurement report) " including the radio quality of the cell C, i.e., to t7.
- Measurement Report transmitter unit 13 may be configured not to transmit, at the same timings, "Measurement Reports" including radio qualities of multiple cells to which different "Measurement Ids” are applied respectively, even when the above conditions are satisfied.
- Measurement Report transmitter unit 13 may be configured not to transmit, at the same timings, "Measurement Reports” including radio qualities of multiple cells to which different “Reporting Configurations” are applied respectively, even when the above conditions are satisfied.
- the Measurement Report transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)" and to repeatedly transmit the “Measurement Report (second measurement report)” at the same timings. Therefore, it is possible to prevent wasteful use of radio resources even when the number of cells to be measured is increased.
- the operation of the radio base station eNB or of the mobile station UE may be implemented by hardware, may be implemented by a software module that is executed by a processor, or may be implemented by combination of both.
- the software module may be provided in any form of storage media including a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM), a register, a hard disc, a removable disc, and a CD-ROM.
- RAM Random Access Memory
- flash memory a ROM (Read Only Memory)
- EPROM Erasable Programmable ROM
- EEPROM Electrically Erasable and Programmable ROM
- register a hard disc, a removable disc, and a CD-ROM.
- Such storage media are connected to the processor so as to allow the processor to read or write information from or to the storage media.
- the storage media may be integrated into a processor.
- the storage media or the processor may be provided in ASIC.
- the ASIC may be provided in the radio base station eNB or the mobile station UE.
- the storage media or the processor may be provided in the radio base station eNB or the mobile station UE as discrete components.
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Description
- The present invention relates to a mobile station configured to start transmitting a measurement report including a radio quality of a cell upon detecting that a monitor period has passed in a state where the radio quality of the cell still satisfies entering conditions, and to repeatedly transmit the measurement report at reporting intervals until leaving conditions are satisfied.
- In a mobile communication system of the "LTE (Long Term Evolution)" system defined by the 3GPP, an "Event Triggered Periodical Reporting" system is known as a method of transmitting a "Measurement Report" by a mobile station UE.
- In a case where the "Event Triggered Periodical Reporting" system is employed, a mobile station UE is configured to start transmitting a "Measurement Report (measurement report)" including an "RSRP: Reference Signal Received Power (radio quality)" of a cell designated by a radio base station eNB, upon detecting that "Time to Trigger (monitor period) " has passed in a state where the "RSRP (radio quality)" of the cell still satisfies entering conditions, and to repeatedly transmit the "Measurement Report (measurement report)" at "Reporting Intervals (reporting interval)" until leaving conditions are satisfied.
- Specifically, as shown in
FIG. 10 , when a mobile station UE detects, at t1, that an "RSRP (radio quality)" of a cell A satisfies entering conditions, and detects, at t3, that "Time to Trigger (monitor period) " has expired in a state where the "RSRP (radio quality)" of the cell A still satisfies the entering conditions, the mobile station UE starts transmitting a "Measurement Report (measurement report)" including the "RSRP (radio quality)" of the cell A. - Thereafter, until leaving conditions are satisfied, the mobile station UE repeatedly transmits the "Measurement Report (measurement report)" at the "Reporting Intervals (reporting interval)", for example, at t5 and t7.
- In the same manner, when the mobile station UE detects, at t2, that an "RSRP (radio quality)" of a cell B satisfies the entering conditions, and detects, at t4, that "Time to Trigger (monitor period)" has expired in a state where the "RSRP (radio quality) " of the cell B still satisfies the entering conditions, the mobile station UE starts transmitting a "Measurement Report (measurement report)" including the "RSRP (radio quality)" of the cell B.
- Thereafter, until the leaving conditions are satisfied, the mobile station UE repeatedly transmits the "Measurement Report (measurement report)" at "Reporting Intervals (reporting interval)", for example, at t6 and t8.
- The prior art includes:
-
WO 2008/000914 A1 , which relates to the interworking between different radio access technologies and discloses the reporting of inter RAT cell measurement from a user equipment. -
WO 00/70897 -
JP 2005-006124 - However, in a conventional method of repeatedly transmitting a "Measurement Report (measurement report) ", such as the "Event Triggered Periodical Reporting" system, a mobile station UE transmits "Measurement Reports (measurement report)" more frequently as the number of cells to be measured by the mobile station UE increases. This causes a problem that radio resources may be wasted.
- Accordingly, the present invention is made to address the above problem, and an object of the present invention is to provide a mobile station which is capable of implementing a method, such as an "Event Triggered Periodical Reporting" system, of repeatedly transmitting a "Measurement Report (measurement report)" by efficiently using radio resources.
- A first aspect of the present invention is summarized as a mobile station configured to start transmitting a measurement report including a radio quality of a cell upon detecting that a monitor period has passed in a state where the radio quality of the cell still satisfies an entering condition, and to repeatedly transmit the measurement report at reporting intervals until a leaving condition is satisfied, wherein, when
the mobile station starts transmitting a first measurement report including a radio quality of a first cell and thereafter starts transmitting a second measurement report including a radio quality of a second cell, the mobile station is configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report, at the same timings. - In the first aspect, when the mobile station does not detect that the monitor period has passed in a state where the radio quality of the second cell still satisfies the entering condition, and when one of the timings to repeatedly transmit the first measurement report comes, the mobile station can be configured not to start transmitting the second measurement report.
- In the first aspect, one of the timings to repeatedly transmit the first measurement report can be adjusted to concur with a timing to start transmitting the second measurement report.
- In the first aspect, a timing to start transmitting the first measurement report can be adjusted to concur with a timing to start transmitting the second measurement report.
- In the first aspect, a maximum reporting interval and a minimum reporting interval can be managed as the reporting intervals, and the mobile station can be configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report at the same timings, when a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval overlaps at least partially with a period between one of the timings to repeatedly transmit the second measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the second measurement report determined by the minimum reporting interval.
- In the first aspect, a maximum reporting interval and a minimum reporting interval can be managed as the reporting intervals, and the mobile station can be configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report not at the same timings, when a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval does not overlap even partially with a period between one of the timings to repeatedly transmit the second measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the second measurement report determined by the minimum reporting interval.
- In the first aspect, a maximum reporting interval and a minimum reporting interval can be managed as the reporting intervals, and the mobile station can be configured to adjust to concurs a starting point of the reporting interval used to determine the timings to repeatedly transmit the first measurement report a timing to start transmitting the second measurement report, when the mobile station starts transmitting the second measurement report within a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval.
- As has been described so far, the present invention is able to provide a mobile station which is capable of implementing a method, such as an "Event Triggered Periodical Reporting" system, of repeatedly transmitting a "Measurement Report (measurement report)" by effectively using radio resources.
- In order to transmit a "Measurement Report (measurement report)", a mobile station UE needs to receive an allocation of an uplink transmission resource from a radio base station eNB. Thus, the mobile station UE needs to transmit a "Scheduling Request (allocation request)" to a radio base station eNB.
- In addition, in each of different timings when the radio base station eNB allocates an uplink transmission resource, the radio base station eNB needs to transmit "PDCCH" which is signaling to specify the resource.
- Accordingly, by use of the present invention, it is possible to reduce overhead of the "Scheduling Request (allocation request)" or "PDCCH", as the repeated transmission of the "Measurement Report (measurement report)" is made less frequently.
-
- [
FIG. 1] FIG. 1 is an entire configuration diagram of a mobile communication system according to a first embodiment of the present invention. - [
FIG. 2] FIG. 2 is a diagram showing an example of a Measurement Configuration received by a mobile station according to the first embodiment of the present invention. - [
FIG. 3] FIG. 3 is a functional block diagram of a mobile station according to the first embodiment of the present invention. - [
FIG. 4] FIG. 4 is a functional block diagram of a core network device according to the first embodiment of the present invention. - [
FIG. 5] FIG. 5 is a chart showing an example of transmission timings of the Measurement Report of the mobile station according to the first embodiment of the present invention. - [
FIG. 6] FIG. 6 is a chart showing an example of transmission timings of the Measurement Report of the mobile station according to the first embodiment of the present invention. - [
FIG. 7] FIG. 7 is a chart showing an example of transmission timings of the Measurement Report of the mobile station according to the first embodiment of the present invention. - [
FIG. 8] FIG. 8 is a chart showing an example of transmission timings of the Measurement Report of the mobile station according to the first embodiment of the present invention. - [
FIG. 9] FIG. 9 is a chart showing an example of transmission timings of the Measurement Report of the mobile station according to the first embodiment of the present invention. - [
FIG. 10] FIG. 10 is a chart showing an example of transmission timings of a Measurement Report of a mobile station according to a prior art. - Referring to
FIG. 1 to FIG. 9 , a description will be given of a configuration of a mobile communication system according to a first embodiment of the present invention. Hereinbelow, a mobile communication system which employs the LTE system will be described in the present embodiment. However, the present invention is not limited to this and is also applicable to mobile communication systems which employ other systems. - In addition, the above-described "Event Triggered Periodical Reporting" system is employed in the present embodiment, as a method of transmitting "Measurement Reports" by a mobile station UE.
- As shown in
FIG. 1 , in a mobile communication system according to the present embodiment, a radio base station eNB is configured to transmit a "Measurement Configuration" to the mobile station UE, by use of an "RRC Connection Reconfiguration". - Specifically, as shown in
FIG. 2 , the radio base station eNB is configured to transmit a "Measurement ID", a "Measurement Object", or a "Reporting Configuration", by use of a "Measurement Configuration". - Here, the "Measurement Object" is information to designate a measurement target cell (for example, RAT information, frequency information, circumference cell information, or the like).
- In addition, the "Reporting Configuration" is information to designate a method of transmitting a "Measurement Report (measurement report)". For example, the "Reporting Configuration" includes an "Event (entering conditions)", "Time to Trigger (monitor period)", a "Reporting Interval (reporting interval)", various parameters, and the like.
- Moreover, the "Measurement ID" is information to associate the "Measurement Object" with the "Reporting Configuration".
- The mobile station UE is configured to measure a radio quality (for example, RSRP) of a certain cell on the basis of the "Measurement Configuration" transmitted by the radio base station eNB, and to transmit a "Measurement Report (measurement report)" including the measurement result.
- Specifically, as shown in
FIG. 3 , the mobile station UE includes a MeasurementConfiguration receiver unit 11, ameasuring unit 12, and a MeasurementReport transmitter unit 13. - The Measurement
Configuration receiver unit 11 is configured to receive the "Measurement Configuration" transmitted by the radio base station eNB. - Here, the Measurement
Configuration receiver unit 11 is configured to manage a "Measurement ID", a "Measurement Object", and a "Reporting Configuration", on the basis of the "Measurement Configuration" thus received. - The
measuring unit 12 is configured to extract a "Measurement Object" associated with the "Measurement ID" managed by the MeasurementConfiguration receiver unit 11. - In addition, the
measuring unit 12 is configured to measure a radio quality of a cell designated by the extracted "Measurement Object". - The Measurement
Report transmitter unit 13 is configured to transmit a "Measurement Report (measurement report)" according to the "Event Triggered Periodical Reporting" system. - In other words, the Measurement
Report transmitter unit 13 is configured to start transmitting a "Measurement Report (measurement report)" including a radio quality (for example, RSRP) of a measurement target cell which is measured by themeasuring unit 12, when the MeasurementReport transmitter unit 13 detects that "Time to Trigger (monitor period) " has passed in a state where the radio quality of the cell still satisfies "Event (entering conditions)", and to repeatedly transmit the "Measurement Report (measurement report)" at "Reporting Intervals (reporting interval)" until leaving conditions (for example, a predetermined number of transmission, or the like) are satisfied. - Specifically, the Measurement
Report transmitter unit 13 is configured to extract a "Reporting Configuration" associated with the "Measurement ID" managed by the MeasurementConfiguration receiver unit 11. - In addition, the Measurement
Report transmitter unit 13 is configured to transmit a "Measurement Report (measurement report)", on the basis of a method specified by the extracted "Reporting Configuration". - Here, consider a case where the Measurement
Report transmitter unit 13 starts transmitting a "Measurement Report (first measurement report) " including a radio quality of a first cell, and then starts transmitting a "Measurement Report (second measurement report)" including a radio quality of a second cell. In this case, the MeasurementReport transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)", and to repeatedly transmit the "Measurement Report (second measurement report)" at the same timings. - For example, referring to
FIG. 4 , consider a case where the MeasurementReport transmitter unit 13 starts transmitting, at t3, a "Measurement Report (first measurement report)" including a radio quality of a cell A (first cell), and then starts transmitting, at t4, a "Measurement Report (second measurement report)" including a radio quality of a cell B (second cell). In this case, the MeasurementReport transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)", and to repeatedly transmit "the Measurement Report (second measurement report)" at the same timings, i.e., at t5 and t7. - Meanwhile, consider a case where the Measurement
Report transmitter unit 13 does not detect that "Time to Trigger (monitor period) " has passed in a state where the radio quality of the second cell still satisfies an "Event (entering conditions)". In this case, the MeasurementReport transmitter unit 13 may be configured not to start transmitting the "Measurement Report (second measurement report) ", even when one of timings to repeatedly transmit the "Measurement Report (first measurement report)" has come. - For example, referring to
FIG. 5 , consider a case where the MeasurementReport transmitter unit 13 does not detect, at t6, that "Time to Trigger (monitor period) " has passed in a state where a radio quality of a cell C (second cell) still satisfies an "Event (entering conditions)". In this case, the MeasurementReport transmitter unit 13 is configured not to start transmitting a "Measurement Report (second measurement report) " including the radio quality of the cell C (second cell), even when one of timings to repeatedly transmit a "Measurement Report (first measurement report)" including a radio quality of a cell A (first cell) has come. - In addition, the Measurement
Report transmitter unit 13 may be configured to adjust to concur a starting point of the "Reporting Interval (reporting interval) " used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)" with a timing to start transmitting the "Measurement Report (second measurement report)". - For example, as shown in
FIG. 6 , the MeasurementReport transmitter unit 13 may be configured to change the starting point of the "Reporting Interval (reporting interval)" used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A (first cell), from t5, to a timing to start transmitting the "Measurement Report (second measurement report) " including the radio quality of the cell B (second cell), i.e., to t4. - Furthermore, the Measurement
Report transmitter unit 13 may be configured to manage a "Max RI (Maximum Reporting Interval)" and a "Min RI (Minimum Reporting Interval)" as the "Reporting Intervals (reporting interval)". - Here, the Measurement
Report transmitter unit 13 may be configured to repeatedly transmit the "Measurement Report (first measurement report)" and to repeatedly transmit the "Measurement Report (second measurement report)" at the same timings in the following case. Specifically, the case is where a period between one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" determined by the "Max RI (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" determined by the "Min RI (Minimum Reporting Interval)" overlaps at least partially with a period between one of the timings to repeatedly transmit the "Measurement Report (second measurement report) " determined by the "Max RI (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (second measurement report)" determined by the "Min RI (Minimum Reporting Interval)". - In an example in
FIG. 7 , one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by the "Max RI (Maximum Reporting Interval)" is "t7", while one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by the "Min RI (Minimum Reporting Interval)" is "15". - Meanwhile, one of the timings to repeatedly transmit the "Measurement Report (second measurement report) " including the radio quality of the cell B determined by the "Max RI (Maximum Reporting Interval)" is "t8", while one of the timings to repeatedly transmit the "Measurement Report (second measurement report)" including the radio quality of the cell B determined by the "Min RI (Minimum Reporting Interval)" is "t6".
- As shown in the example in
FIG. 7 , the period between "t5" and "t7" overlaps partially with the period between "t6" and "t8". Accordingly, the MeasurementReport transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A, and to repeatedly transmit the "Measurement Report (second measurement report) " including the radio quality of the cell B at the same timing, i.e., at t7. - Alternatively, the Measurement
Report transmitter unit 13 may be configured to, not at the same timings, repeatedly transmit the "Measurement Report (first measurement report)" and to repeatedly transmit the "Measurement Report (second measurement report)" in the following case. Specifically, the case is where a period between one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" determined by the "Max RJ. (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (first measurement report) " determined by the "Min RI (Minimum Reporting Interval)" does not overlap even partially with a period between one of the timings to repeatedly transmit the "Measurement Report (second measurement report) " determined by the "Max RI (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (second measurement report)" determined by the "Min RI (Minimum Reporting Interval)". - In the example in
FIG. 8 , one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by "Max RI (Maximum Reporting Interval)" is "t6", while one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by "Min RI (Minimum Reporting Interval)" is "t5". - Meanwhile, one of the timings to repeatedly transmit the "Measurement Report (second measurement report) " including the radio quality of the cell B determined by the "Max RI (Maximum Reporting Interval)" is "t8", while one of the timings to repeatedly transmit the "Measurement Report (second measurement report)" including the radio quality of the cell B determined by the "Min RI (Minimum Reporting Interval)" is "t7".
- As shown in the example in
FIG. 8 , the period between "t5" and "t6" does not overlap with the period between "t7" and "t8". Accordingly, the MeasurementReport transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report) " including the radio quality of the cell A at t6, and to repeatedly transmit the "Measurement Report (second measurement report)" including the radio quality of the cell B at t8. - Furthermore, the Measurement
Report transmitter unit 13 may be configured to adjust to concur the starting point of "Reporting Interval (reporting interval) " used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)" with a timing to start transmitting the "Measurement Report (second measurement report)" in the following case. Specifically, the case is where the MeasurementReport transmitter unit 13 starts transmitting the "Measurement Report (second measurement report)" during a period between one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" determined by the "Max RI (Maximum Reporting Interval) " and one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" determined by the "Min RI (Minimum Reporting Interval)". - In the example in
FIG. 9 , one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by "Max RI (Maximum Reporting Interval)" is "t8", while one of the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A determined by "Min RI (Minimum Reporting Interval)" is "t6". - Meanwhile, the timing when the Measurement
Report transmitter unit 13 starts transmitting the "Measurement Report (second measurement report) " including the radio quality of the cell C is "t7". - As shown in the example in
FIG. 9 , "t7" is within the period between "t6" and "t8". Accordingly, the MeasurementReport transmitter unit 13 may be configured to change the starting point of the "Reporting Interval (reporting interval) "used to determine the timings to repeatedly transmit the "Measurement Report (first measurement report)" including the radio quality of the cell A, from t8, to a timing to start transmitting the "Measurement Report (second measurement report) " including the radio quality of the cell C, i.e., to t7. - Note that the Measurement
Report transmitter unit 13 may be configured not to transmit, at the same timings, "Measurement Reports" including radio qualities of multiple cells to which different "Measurement Ids" are applied respectively, even when the above conditions are satisfied. - Also note that the Measurement
Report transmitter unit 13 may be configured not to transmit, at the same timings, "Measurement Reports" including radio qualities of multiple cells to which different "Reporting Configurations" are applied respectively, even when the above conditions are satisfied. - This is because the different "Reporting Configurations" may include different "Reporting Intervals (reporting interval)" or different "Time to Trigger (monitor period)".
- In the mobile communication system according to the first embodiment of the present invention, the Measurement
Report transmitter unit 13 is configured to repeatedly transmit the "Measurement Report (first measurement report)" and to repeatedly transmit the "Measurement Report (second measurement report)" at the same timings. Therefore, it is possible to prevent wasteful use of radio resources even when the number of cells to be measured is increased. - In addition, by use of the mobile communication system according to the first embodiment of the present invention, it is possible to reduce overhead of the "Scheduling Request (allocation request) " or "PDCCH", as the repeated transmission of the "Measurement Report (measurement report)" is made less frequently.
- Note that the operation of the radio base station eNB or of the mobile station UE may be implemented by hardware, may be implemented by a software module that is executed by a processor, or may be implemented by combination of both.
- The software module may be provided in any form of storage media including a RAM (Random Access Memory), a flash memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM), a register, a hard disc, a removable disc, and a CD-ROM.
- Such storage media are connected to the processor so as to allow the processor to read or write information from or to the storage media. Alternatively, such the storage media may be integrated into a processor. Furthermore, the storage media or the processor may be provided in ASIC. The ASIC may be provided in the radio base station eNB or the mobile station UE. Instead, the storage media or the processor may be provided in the radio base station eNB or the mobile station UE as discrete components.
- Hereinabove, the present invention has been described in detail using the above embodiment. However, it is apparent for those skilled in the art that the present invention is not limited to the embodiment described herein. The present invention can be implemented as modifications and alternative embodiments without departing from the scope of the invention defined by the claims. Accordingly, the description herein is intended only for an exemplary purpose and has no intention to limit the present invention.
Claims (7)
- A mobile station configured to start transmitting a measurement report including a radio quality of a cell upon detecting that a monitor period has passed in a state where the radio quality of the cell still satisfies an entering condition, and to repeatedly transmit the measurement report at reporting intervals until a leaving condition is satisfied, wherein
when the mobile station starts transmitting a first measurement report including a radio quality of a first cell and thereafter starts transmitting a second measurement report including a radio quality of a second cell, the mobile station is configured to repeatedly transmit, at the same timings, the first measurement report and the second measurement report. - The mobile station according to claim 1, wherein when the mobile station does not detect that the monitor period has passed in a state where the radio quality of the second cell still satisfies the entering condition, and when one of the timings to repeatedly transmit the first measurement report comes, the mobile station is configured not to start transmitting the second measurement report.
- The mobile station according to claim 1, wherein one of the timings to repeatedly transmit the first measurement report is adjusted to concur with a timing to start transmitting the second measurement report.
- The mobile station according to claim 3, wherein
a timing to start transmitting the first measurement report is adjusted to concur with a timing to start transmitting the second measurement report. - The mobile station according to claim 1, wherein
a maximum reporting interval and a minimum reporting interval are managed as the reporting intervals, and
the mobile station is configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report at the same timings, when a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval overlaps at least partially with a period between one of the timings to repeatedly transmit the second measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the second measurement report determined by the minimum reporting interval. - The mobile station according to claim 1, wherein
a maximum reporting interval and a minimum reporting interval are managed as the reporting intervals, and
the mobile station is configured to repeatedly transmit the first measurement report and to repeatedly transmit the second measurement report not at the same timings, when a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval does not overlap even partially with a period between one of the timings to repeatedly transmit the second measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the second measurement report determined by the minimum reporting interval. - The mobile station according to claim 1, wherein
a maximum reporting interval and a minimum reporting interval are managed as the reporting intervals, and
the mobile station is configured to adjust to concur a starting point of the reporting interval used to determine the timings to repeatedly transmit the first measurement report with a timing to start transmitting the second measurement report, when the mobile station starts transmitting the second measurement report within a period between one of the timings to repeatedly transmit the first measurement report determined by the maximum reporting interval and one of the timings to repeatedly transmit the first measurement report determined by the minimum reporting interval.
Priority Applications (1)
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PL09754799T PL2222109T3 (en) | 2008-05-30 | 2009-05-29 | Mobile station |
Applications Claiming Priority (2)
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JP2008143799A JP4361121B1 (en) | 2008-05-30 | 2008-05-30 | Mobile station |
PCT/JP2009/059851 WO2009145291A1 (en) | 2008-05-30 | 2009-05-29 | Mobile station |
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EP2222109A1 EP2222109A1 (en) | 2010-08-25 |
EP2222109A4 EP2222109A4 (en) | 2010-12-22 |
EP2222109B1 true EP2222109B1 (en) | 2018-04-25 |
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JP (1) | JP4361121B1 (en) |
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CN (1) | CN101940022B (en) |
AU (1) | AU2009252222B8 (en) |
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CA (1) | CA2710565A1 (en) |
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PL (1) | PL2222109T3 (en) |
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JP2011114702A (en) * | 2009-11-27 | 2011-06-09 | Ntt Docomo Inc | Mobile communication method, mobile station, and radio base station |
CN102104930A (en) * | 2010-06-12 | 2011-06-22 | 电信科学技术研究院 | Mapping method and apparatus in resource status process |
CA2732560C (en) | 2010-06-28 | 2015-04-14 | Research In Motion Limited | Method and apparatus for sending measurement report messages from a wireless telecommunications device to a wireless telecommunications network |
WO2012026053A1 (en) * | 2010-08-25 | 2012-03-01 | 日本電気株式会社 | Base station, service providing device, mobile station, mobile communication system, and communication control method therefor |
CN102469494B (en) * | 2010-11-04 | 2016-03-30 | 华为技术有限公司 | Multicarrier measurement report report method and equipment |
US8744450B2 (en) * | 2011-04-04 | 2014-06-03 | Kyocera Corporation | Mobile communication method |
US10588107B2 (en) * | 2012-10-26 | 2020-03-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods of positioning in a system comprising measuring nodes with multiple receiving points |
CN106797653B (en) | 2014-10-10 | 2020-11-24 | 瑞典爱立信有限公司 | Wireless device reporting |
DE102015205122B4 (en) * | 2015-03-20 | 2020-02-20 | Wiha Werkzeuge Gmbh | screwdriver |
US10075868B2 (en) * | 2016-11-03 | 2018-09-11 | Qualcomm Incorporated | Controlling reporting operations for wireless communication |
WO2019031943A1 (en) * | 2017-08-11 | 2019-02-14 | Lg Electronics Inc. | Method for reporting measurement result and device supporting the same |
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KR100291476B1 (en) * | 1998-05-25 | 2001-07-12 | 윤종용 | A method and a system for controlling a pilot measurement request order in cellular system |
US6445917B1 (en) * | 1999-05-19 | 2002-09-03 | Telefonaktiebolaget Lm Ericsson (Publ) | Mobile station measurements with event-based reporting |
GB2372404B (en) * | 2001-02-16 | 2003-04-09 | Ericsson Telefon Ab L M | Telecommunications system |
KR20040036863A (en) * | 2002-10-25 | 2004-05-03 | 삼성전자주식회사 | Method for transmitting measurement report message in universal mobile telecommunication systems |
RU2352069C2 (en) * | 2003-02-18 | 2009-04-10 | Квэлкомм Инкорпорейтед | Systems and methods for application of selected frame durations in system of wireless communication |
DE602004005327T2 (en) * | 2003-05-13 | 2007-11-22 | Koninklijke Philips Electronics N.V. | RADIO COMMUNICATION SYSTEM |
JP2005006124A (en) | 2003-06-12 | 2005-01-06 | Nec Corp | System and method for notifying receiving state information of portable telephone terminal device |
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GB2434714A (en) * | 2006-01-26 | 2007-08-01 | Nec Technologies | Inter-frequency measurement |
JP4619311B2 (en) * | 2006-03-20 | 2011-01-26 | 株式会社エヌ・ティ・ティ・ドコモ | Base station, mobile station, and radio channel state notification method |
FI20065467A0 (en) * | 2006-06-30 | 2006-06-30 | Nokia Corp | Neighbor Cell Measurement and Reporting in a Multiple Radio Access Technology (RAT) environment |
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KR101386103B1 (en) * | 2007-06-21 | 2014-04-16 | 인터디지탈 테크날러지 코포레이션 | Handover related measurement reporting for e-utran |
GB2469027A (en) * | 2009-03-30 | 2010-10-06 | Nec Corp | Enabling a mobile to make inter-RAT measurements |
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- 2008-05-30 JP JP2008143799A patent/JP4361121B1/en active Active
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2009
- 2009-05-29 BR BRPI0906862-7A patent/BRPI0906862A2/en not_active IP Right Cessation
- 2009-05-29 PL PL09754799T patent/PL2222109T3/en unknown
- 2009-05-29 MX MX2010007371A patent/MX2010007371A/en active IP Right Grant
- 2009-05-29 AU AU2009252222A patent/AU2009252222B8/en not_active Ceased
- 2009-05-29 CN CN200980104266.8A patent/CN101940022B/en active Active
- 2009-05-29 EP EP09754799.6A patent/EP2222109B1/en active Active
- 2009-05-29 US US12/810,441 patent/US9042834B2/en active Active
- 2009-05-29 CA CA2710565A patent/CA2710565A1/en not_active Abandoned
- 2009-05-29 RU RU2010125710/07A patent/RU2457635C2/en not_active IP Right Cessation
- 2009-05-29 WO PCT/JP2009/059851 patent/WO2009145291A1/en active Application Filing
- 2009-05-29 KR KR1020107013364A patent/KR101126569B1/en not_active IP Right Cessation
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US9042834B2 (en) | 2015-05-26 |
AU2009252222A1 (en) | 2009-12-03 |
PL2222109T3 (en) | 2018-08-31 |
EP2222109A4 (en) | 2010-12-22 |
BRPI0906862A2 (en) | 2015-07-07 |
KR101126569B1 (en) | 2012-03-23 |
RU2457635C2 (en) | 2012-07-27 |
CN101940022A (en) | 2011-01-05 |
CN101940022B (en) | 2013-04-17 |
MX2010007371A (en) | 2010-08-13 |
KR20100086060A (en) | 2010-07-29 |
US20110009067A1 (en) | 2011-01-13 |
CA2710565A1 (en) | 2009-12-03 |
JP2009290796A (en) | 2009-12-10 |
JP4361121B1 (en) | 2009-11-11 |
WO2009145291A1 (en) | 2009-12-03 |
AU2009252222B8 (en) | 2013-02-14 |
EP2222109A1 (en) | 2010-08-25 |
AU2009252222B2 (en) | 2012-09-27 |
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